J34 



tabulated above, after allowing a current to pass throiigli for one lionr 

 Intensity of the obliquely diffused light. 



Initially 



Eugenol.. . 

 Guaiacol. . 

 Cressol . . . 

 Carvacrol, 

 Citral ... 

 Cumidin . 

 Thymol. . , 

 Hypnone. , 



31 

 37 

 24 

 20 

 20 

 15 

 15 

 10 



After displacement of the micellae in the suspensoids through the 

 inthience of the cni-rent, the surface tension in the arm of the positive 

 pole aj)pears to become somewhat less than in the ai-m containing 

 the negative pole. 



When heating an aqueous eugenol solution 1 : 1200 beyond 40°, 

 the opalescence decreases, whereas it returns on cooling and after a 

 few days becomes more intense than before. Below 30° no change 

 occurs, even when the solution is maintained at 30° for 24 hours. 



Similarly a colloidal solution of eugenol in glycerin appeared to be 

 much less opalescent on hot summerdays than on cooler days preceding 

 or following. 



